CN111187560B - Ultrahigh-voltage flame-retardant insulating powder for outdoor busbar and preparation method thereof - Google Patents
Ultrahigh-voltage flame-retardant insulating powder for outdoor busbar and preparation method thereof Download PDFInfo
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- CN111187560B CN111187560B CN202010249213.3A CN202010249213A CN111187560B CN 111187560 B CN111187560 B CN 111187560B CN 202010249213 A CN202010249213 A CN 202010249213A CN 111187560 B CN111187560 B CN 111187560B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses ultrahigh-voltage flame-retardant insulating powder for an outdoor busbar and a preparation method thereof, wherein the ultrahigh-voltage flame-retardant insulating powder comprises the following raw materials in parts by weight: resin A: 10% -15%, epoxy resin B: 10% -15%, resin C: 25% -30%, curing agent: 15% -20%, filler: 10% -20%, flame retardant: 5% -10%, auxiliary agent: 1 to 3 percent, and the total weight of the components is 100 percent. The ultrahigh-voltage flame-retardant insulating powder overcomes the defect that the traditional epoxy insulating powder cannot be used in outdoor severe environment, and has excellent weather resistance, corrosion resistance, excellent electrical insulation and high flame retardance.
Description
Technical Field
The invention relates to ultrahigh-voltage flame-retardant insulating powder for an outdoor busbar and a preparation method thereof, belonging to the field of functional powder coatings.
Background
The outdoor bus bar and lightning rod insulators are often in extremely severe use environments and are at the risk of instantaneous high-voltage breakdown, so that the requirement on the coating on the base material is extremely high. The existing powder coating products are divided into two large blocks, one is decorative powder coating, the electrical insulation performance is not considered primarily, the other is epoxy insulating powder coating, the outdoor weather resistance is poor, simultaneously, the instant ultrahigh pressure of thunder is not used, the high temperature brought by the instant ultrahigh pressure can reach the burning point of matrix resin no matter the decorative powder coating or the epoxy insulating powder coating, and the application of the powder coating in the fields is greatly limited by the severe standards. Therefore, the preparation of the insulating powder coating which can simultaneously meet the requirements of ultra-weather resistance, high electrical insulation and high flame retardance has important significance.
Disclosure of Invention
The invention aims to provide ultrahigh-voltage flame-retardant insulating powder for an outdoor busbar, which is 275-800 KV in the field of national power grid ultrahigh voltage, and the insulating powder is required to have the ultrahigh weather resistance, high voltage-resistant grade and high flame retardance which are not possessed by the existing powder coating in the voltage range. The invention fundamentally solves the problem that the insulating powder can not be used in severe environment, which greatly widens the application field of the insulating powder coating, replaces thermoplastic sleeves in the national power grid transformation plan, replaces paint in the military electronic field, and brings a brand-new technical scheme for the special field. The invention also aims to provide a preparation method of the ultrahigh-voltage flame-retardant insulating powder for the outdoor busbar.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the ultrahigh-voltage flame-retardant insulating powder for the outdoor busbar comprises the following raw materials in parts by weight:
resin A: 10% -15%;
epoxy resin B: 10% -15%;
resin C: 25% -30%;
curing agent: 15% -20%;
filling: 10% -20%;
flame retardant: 5% -10%;
auxiliary agent: 1 to 3 percent, and the total weight of all the components is 100 percent.
Preferably, the resin A is amino polysiloxane modified epoxy resin, the resin utilizes the advantages of high and low temperature resistance, hydrophobicity, weather resistance and the like of amino polysiloxane, in the invention, the resin is combined with the epoxy resin B with high electrical insulation, the advantages are complementary, and the epoxy equivalent range is 450-1700 g/eg.
Preferably, the epoxy equivalent range of the epoxy resin B is 1700-2000g/eg, the softening point range is 85-95 ℃, the epoxy resin B selected by the invention has low softening point and high epoxy equivalent, and the epoxy resin B is matched with the resin A and the resin C selected by the invention for use, so that the high adhesive force, high toughness and high strength performance which are not simultaneously possessed by the conventional epoxy resin are realized.
Preferably, the resin C is a dipentene modified polyester resin, and the acid value is 30-40 mgKOH/g.
Preferably, the curing agent is N-alkyl imidazole grafted polyhydric phenol, and the hydroxyl equivalent weight is 320-440 g/eg; the N-alkyl imidazole belongs to nitrogenous multi-ring curable epoxy resin, phenolic hydroxyl can be subjected to crosslinking reaction with epoxy groups, so that the curing agent has a plurality of active groups in the structure to be crosslinked and cured with the epoxy resin, the crosslinking density of the insulating powder is greatly improved, and the mechanical property of a cured product is fully improved. In addition, the curing agent contains nitrogen element, and the curing agent can act with combustible to promote crosslinking to form charcoal in the combustion and decomposition process, reduce the temperature of the combustible, avoid the generation of combustible gas and achieve the flame-retardant effect.
Preferably, the filler is a mixture of silicane powder treated by silane and silica micropowder treated by silane, the compounding ratio is 2:1, and the mesh number is 1000-5000 meshes. The wollastonite powder and the silica powder treated by silane are commercially available, the combination fully exerts the weather resistance of the product, and the composition has the synergistic effect with a flame retardant to increase the flame retardant effect and the synergistic effect with resin to increase the compressive strength. In addition, the filler treated by silane is selected, and the difference from the untreated filler is the compatibility of the filler and resin, and tests show that the treated compatibility is better, and various properties of the finished product are exerted more fully.
Preferably, the flame retardant is a mixture of phosphazene and phosphate ester, and the compounding ratio is 1: 1; in the scheme, the compound organic phosphorus flame retardant is selected and combined with the compound inorganic silicon filler to form a compound flame retardant system, and omnibearing flame retardance is performed from the angles of carbon formation, oxygen isolation, heat insulation and oxygen concentration dilution.
Preferably, the auxiliary agent is a mixture of a compatilizer, an accelerator, a leveling agent, an antioxidant and a defoaming agent.
The invention also discloses a preparation method of the insulating powder, which adopts the following steps that are connected in sequence:
(1) weighing the resin A, the resin B, the resin C and the compatilizer in corresponding parts by weight, adding the resin A, the resin B, the resin C and the compatilizer into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
(2) and (2) melting and extruding the mixture in the step (1) through a double screw, wherein the temperature of a melting section is 100-.
(3) Putting the fragments obtained in the step (2) into a mixing cylinder, adding corresponding parts of fillers, and stirring for 5min at a speed of 800-900 r/min; then adding a flame retardant, a curing agent and an auxiliary agent, and continuously stirring for 10min at a speed of 800-900 r/min to fully and uniformly mix;
(4) and (4) melting and extruding the mixture in the step (3) through a double screw, wherein the temperature of a melting section is 90-100 ℃, the extrusion temperature of a machine head is 100-110 ℃, and cooling water is introduced into the screw. Tabletting by a tabletting machine, air cooling, crushing, air grading grinding granulation and sieving to obtain finished powder.
In the step (1) of the feeding method, the three resins belong to different types, although the three resins are modified, the compatibility is not the same as that of the three resins, the three resins are pre-dispersed, and a compatilizer is further added for compatibilization; the step (2) of melt extrusion of the mixture of the three resins also further increases the compatibility of the three resins; the feeding method is different from the traditional blending method of base material and filler without sequence: firstly, the base material filler is separated and pre-dispersed step by step, and secondly, the base material resin is melted and extruded in the next step under the condition of not participating in the reaction, so that the compatibility of different types of resins is greatly improved, and the structural integrity of the cross-linking reaction is ensured.
The technical scheme adopted by the invention has the beneficial effects that:
the outdoor ultrahigh-voltage flame-retardant insulating powder disclosed by the invention highlights the compound combination of three resins and a composite flame-retardant system formed by a flame retardant, a curing agent and a filler, so that the insulating powder obtains ultrahigh flame-retardant performance. In addition, the insulating powder also has the advantages of super-weather resistance, high insulativity and the like, and the brand new application field of the insulating powder is developed; the ultra-high-voltage flame-retardant insulating powder has super weather resistance, is acid-base-resistant and solvent-resistant under standard conditions for 1000 hours, has ultrahigh insulativity, has the voltage resistance of a 0.1mm coating layer of 10KV, is not punctured and has high flame retardancy, and a 0.3mm test piece can pass UL-94 test V0 level according to the calculation of an ultraviolet aging period, is almost non-combustible, and is an ideal material in the special field, in addition, the preparation method of the outdoor ultra-high-voltage flame-retardant insulating powder is simple, the process is stable, and the ultra-high.
Detailed Description
For a further understanding of the present invention, reference will now be made to specific examples, which are not intended to be limiting.
In the invention, the selected auxiliary agent is a mixture of a compatilizer, an accelerator, a flatting agent, an antioxidant, a defoaming agent and a pigment. The compatilizer includes maleic anhydride grafted epoxy group and maleic anhydride grafted siloxane. Accelerators, leveling agents, antioxidants, defoamers, and pigments are conventionally selected in the art. The raw materials of the insulating powder are commercially available.
The mesh number of the selected filler wollastonite powder and silica powder is 1000-5000 meshes, the preferred mesh number is 2000 meshes, and other suitable mesh numbers (such as 1000 meshes, 3000 meshes, 4000 meshes and 5000 meshes) fall within the protection scope of the invention.
Example 1
The ultrahigh-voltage flame-retardant insulating powder for the outdoor busbar comprises the following raw materials in parts by weight:
the coating comprises, by weight, resin A10%, resin B15%, resin C28%, a curing agent 15.4%, silane-treated wollastonite powder and silane-treated silica micropowder 20% (the compounding weight ratio is 2: 1), a phosphazene and phosphate ester mixture 10% (the compounding weight ratio is 1: 1), and an auxiliary agent 1.6%, wherein the dosage of a compatilizer accounts for 1% of the total weight of the raw materials.
The resin A is amino polysiloxane modified epoxy resin with an epoxy equivalent range of 450-1700 g/eg.
The epoxy equivalent weight range of the resin B is 1700-2000g/eg, and the softening point range is 85-95 ℃.
The resin C is dipentene modified polyester resin and has an acid value of 30-40 mgKOH/g.
The curing agent adopts the polyhydric phenol grafted by the N-alkyl imidazole, and the hydroxyl equivalent weight is 320-440 g/eg.
The wollastonite powder and the silica powder are treated by silane, and the particle size is between 1000-5000 meshes.
The preparation method of the ultrahigh-voltage flame-retardant insulating powder for the outdoor bus bar comprises the following steps of:
(1) weighing the resin A, the resin B, the resin C and the compatilizer in corresponding parts by weight, adding the resin A, the resin B, the resin C and the compatilizer into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
(2) and (2) melting and extruding the mixture in the step (1) through a double screw, wherein the temperature of a melting section is 100-.
(3) Putting the fragments obtained in the step (2) into a mixing cylinder, adding the silicalite powder and the silica powder which are treated by silane in corresponding parts, and stirring for 5min at a speed of 800-900 r/min; then adding phosphazene, phosphate ester, curing agent and auxiliary agent, and continuing stirring at 800-900 r/min for 10min to fully and uniformly mix;
(4) and (4) melting and extruding the mixture in the step (3) through a double screw, wherein the temperature of a melting section is 90-100 ℃, the extrusion temperature of a machine head is 100-110 ℃, and cooling water is introduced into the screw. Tabletting by a tabletting machine, air cooling, crushing, air grading grinding granulation, sieving, and finally removing impurities by magnetic separation to obtain finished powder; after testing, the indexes are listed in Table 1.
Example 2
The procedure is the same as that of example 1, except that the raw materials comprise, by weight, resin A15%, resin B15%, resin C28%, curing agent 20%, silane-treated wollastonite powder and silane-treated silica micropowder 13% (formulation weight ratio 2: 1), phosphazene/phosphate mixture 7.4% (formulation weight ratio 1: 1), and auxiliary agent 1.6%, wherein the amount of the compatibilizer accounts for 1% of the total weight of the raw materials.
The preparation method is the same as example 1.
After testing, the indexes are listed in Table 1.
Example 3
The procedure of example 1 is the same, except that the raw materials comprise, by weight, resin a15%, resin B15%, resin C25%, a curing agent (18.3%, silane-treated wollastonite powder and silane-treated silica micropowder 20% (formulation weight ratio 2: 1), phosphazene-phosphate mixture 5% (formulation weight ratio 1: 1), and an auxiliary agent 1.7%, wherein the amount of the compatibilizer is 1% of the total weight of the raw materials.
The preparation method is the same as example 1.
After testing, the indexes are listed in Table 1.
Example 4
The same preparation method as in example 1 was adopted, wherein the raw materials comprise by weight: resin A15%, resin B10%, resin C30%, curing agent 15%, silane-treated wollastonite powder and silane-treated silica micropowder 19% (weight ratio of 2: 1), phosphazene and phosphate ester mixture 10% (weight ratio of 1: 1), and assistant 1%.
Example 5
The same preparation method as in example 1 was adopted, wherein the raw materials comprise by weight: resin A15%, resin B15%, resin C27%, curing agent 20%, silane-treated wollastonite powder and silane-treated silica micropowder 10% (weight ratio of 2: 1), phosphazene and phosphate ester mixture 10% (weight ratio of 1: 1), and assistant 3%.
Comparative example 1
The same raw material selection as in example 1 was used, except that the curing agent was dicyandiamide. The raw materials comprise, by weight, 12% of resin A (purchased at home), 15% of resin B (purchased at home), 28% of resin C (imported at market), 15% of a curing agent, 17.3% of silicalite powder treated by silane and silica micropowder treated by silane (the compounding weight ratio is 2: 1), 10% of a phosphazene and phosphate ester mixture (the compounding weight ratio is 1: 1) and 2.7% of an auxiliary agent, wherein the using amount of a compatilizer accounts for 2% of the total weight of the raw materials.
The preparation method is the same as example 1.
After testing, the indexes are listed in Table 1.
Comparative example 2
The same raw material selection was used as in example 1, except that the filler component was replaced with calcium carbonate. The components of the raw materials in parts by weight are resin A12%, resin B12%, resin C27.3%, curing agent 18%, calcium carbonate 18%, phosphazene and phosphate ester mixture 10% (weight ratio of 1: 1), and auxiliary agent 2.7%, wherein the dosage of the compatilizer accounts for 2% of the total weight of the raw materials.
The preparation method is the same as example 1.
After testing, the indexes are listed in Table 1.
Comparative example 3
The same raw material selection as in example 1 was used, except that the filler component was replaced with a mixture of untreated wollastonite powder and fine silica powder. The components of the raw materials in parts by weight are resin A10%, resin B15%, resin C30%, curing agent 20%, wollastonite in powder and silica powder 13.4% (weight ratio of 2: 1), phosphazene and phosphate ester mixture 10% (weight ratio of 1: 1), and auxiliary agent 1.6%, wherein the amount of compatilizer accounts for 1% of the total weight of the raw materials.
The preparation method is the same as example 1.
After testing, the indexes are listed in Table 1.
TABLE 1
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The ultrahigh-voltage flame-retardant insulating powder for the outdoor busbar is characterized by comprising the following raw materials in parts by weight:
resin A: 10% -15%;
resin B: 10% -15%;
resin C: 25% -30%;
curing agent: 15% -20%;
filling: 10% -20%;
flame retardant: 5% -10%;
auxiliary agent: 1% -3%; the total weight of the components is 100 percent;
the resin A is amino polysiloxane modified epoxy resin;
the resin B is epoxy resin with the epoxy equivalent weight range of 1700-2000g/eg and the softening point range of 85-95 ℃;
the resin C is a dipentene modified polyester resin;
the curing agent adopts polyhydric phenol grafted by N-alkyl imidazole, and the hydroxyl equivalent weight is 320-440 g/eg;
the filler is a mixture of silicane treated wollastonite powder and silicane treated silicon micropowder, the compounding weight ratio is 2:1, and the mesh number is 1000-5000 meshes;
the flame retardant is a mixture of phosphazene and phosphate ester, and the compounding weight ratio is 1: 1;
the auxiliary agent is a mixture of a compatilizer, an accelerator, a leveling agent, an antioxidant, a defoaming agent and a pigment.
2. The ultrahigh-voltage flame-retardant insulating powder for the outdoor bus bar according to claim 1, which is characterized in that: the epoxy equivalent weight range of the resin A is 450-1700 g/eg.
3. The ultrahigh-voltage flame-retardant insulating powder for the outdoor bus bar according to claim 1, which is characterized in that: the acid value of the resin C is 30-40 mgKOH/g.
4. A method for preparing an insulating powder according to any one of claims 1 to 3, characterized in that: the method comprises the following steps of:
(1) weighing the resin A, the resin B, the resin C and the compatilizer in corresponding parts by weight, adding the resin A, the resin B, the resin C and the compatilizer into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
(2) melting and extruding the mixture in the step (1) through a double screw, wherein the temperature of a melting section is 100-;
(3) putting the fragments obtained in the step (2) into a mixing cylinder, adding corresponding parts of fillers, and stirring for 5min at a speed of 800-900 r/min; then adding a curing agent, a flame retardant and an auxiliary agent, and continuously stirring for 10min at the speed of 800-900 r/min to fully and uniformly mix;
(4) melting and extruding the mixture in the step (3) through a double screw, wherein the temperature of a melting section is 90-100 ℃, the extrusion temperature of a machine head is 100-; tabletting by a tabletting machine, air cooling, crushing, air grading grinding granulation and sieving to obtain finished powder.
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| CN202010249213.3A CN111187560B (en) | 2020-04-01 | 2020-04-01 | Ultrahigh-voltage flame-retardant insulating powder for outdoor busbar and preparation method thereof |
| PCT/CN2020/099911 WO2021196437A1 (en) | 2020-04-01 | 2020-07-02 | Ultrahigh-voltage flame-retardant insulation powder for outdoor bus bar, and preparation method therefor |
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| CN202010249213.3A CN111187560B (en) | 2020-04-01 | 2020-04-01 | Ultrahigh-voltage flame-retardant insulating powder for outdoor busbar and preparation method thereof |
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| CN111187560B true CN111187560B (en) | 2021-05-28 |
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| CN114058247A (en) * | 2021-11-22 | 2022-02-18 | 擎天材料科技有限公司 | Insulating powder coating and preparation method and application thereof |
| CN114032011B (en) * | 2021-12-17 | 2022-05-17 | 佛山市蓝林新材料科技有限公司 | High-brightness electroplating effect imitating powder coating and preparation method thereof |
| CN114133843A (en) * | 2021-12-30 | 2022-03-04 | 无锡长川材料科技有限公司 | Insulating high-voltage-resistant corrosion-resistant coating and preparation method and use method thereof |
| CN116333567B (en) * | 2023-04-11 | 2023-12-29 | 浙江大学 | Insulating powder for flexible connection of bus bar of power battery and preparation method thereof |
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| CN110511362A (en) * | 2019-08-20 | 2019-11-29 | 德州名将工贸有限公司 | A kind of open air high glass transition temperature thermosetting powder coating preparation method of polyester resin |
| CN110527401B (en) * | 2019-09-09 | 2021-04-20 | 擎天材料科技有限公司 | Powder coating and workpiece |
| CN110643280A (en) * | 2019-10-22 | 2020-01-03 | 广西南宁维一防腐科技有限公司 | High-temperature-resistant flame-retardant powder coating and preparation method thereof |
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2020
- 2020-04-01 CN CN202010249213.3A patent/CN111187560B/en active Active
- 2020-07-02 WO PCT/CN2020/099911 patent/WO2021196437A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110546218A (en) * | 2017-02-20 | 2019-12-06 | 老虎涂料有限责任及两合公司 | Powder coating composition |
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| WO2021196437A1 (en) | 2021-10-07 |
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